.form-bg{
    background: #7942C8;
}
.form-horizontal{
    background: #fff;
    padding-bottom: 40px;
    border-radius: 15px;
    text-align: center;
}
.form-horizontal .heading{
	/*用户登录*/
    display: block;
    font-size:28px;
    font-weight: 400;
    padding: 20px 0;
    border-bottom: 1px solid #7942C8;
    margin-bottom: 30px;
}
.form-horizontal .form-group{
    padding: 10 40px;
    margin: 0 0 25px 0;  /*用户名、登录框的间距*/
    position: relative;
}
.form-horizontal .form-control{
	/*用户名、密码框*/
    background: #f0f0f0;
    border: none;
    border-radius: 5px;
    box-shadow: none;
    padding: 0 20px 0 45px;
    height: 40px;
    transition: all 0.3s ease 0s;
}
.form-horizontal .form-control:focus{
    background: #e0e0e0;
    box-shadow: none;
    outline: 0 none;
}
.form-horizontal .form-group i{
    position: absolute;
    top: 12px;
    left: 60px;
    font-size: 20px;
    color: #c8c8c8;
    transition : all 0.5s ease 0s;
}
.form-horizontal .form-control:focus + i{
    color: #7942C8;
}
.form-horizontal .fa-question-circle{
    display: inline-block;
    position: absolute;
    top: 12px;
    right: 60px;
    font-size: 20px;
    color: #808080;
    transition: all 0.5s ease 0s;
}
.form-horizontal .fa-question-circle:hover{
    color: #000;
}
.form-horizontal .main-checkbox{
	/*记住密码小圆点*/
    float: left;
    width: 20px;
    height: 20px;
    background: #FFFFFF;
    border-radius: 50%;
    position: relative;
    margin: 12px 0 0 5px;
    border: 2px solid #7942C8;
}
.form-horizontal .main-checkbox label{
    width: 100px;
    height: 20px;
    position: absolute;
    top: 0;
    left: 0;
    cursor: pointer;
}
.form-horizontal .main-checkbox label:after{
    content: "";
    width: 10px;
    height: 5px;
    position: absolute;
    top: 5px;
    left: 4px;
    border: 3px solid #7942C8; /*记住密码的对勾*/
    border-top: none;
    border-right: none;
    background: transparent;
    opacity: 0;
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
}
.form-horizontal .main-checkbox input[type=checkbox]{
    visibility: hidden;
}
.form-horizontal .main-checkbox input[type=checkbox]:checked + label:after{
    opacity: 1;
}
.form-horizontal .text{
    float: left;
    margin-left: 7px;
    line-height: 20px;
    padding-top: 12px;  /*记住密码四个字的位置*/
    text-transform: capitalize;
}
.form-horizontal .btn{
	/*登录按钮*/
    float: right;
    font-size: 16px;
    color: #fff;
    background: #7942C8;
    border-radius: 30px;
    padding: 10px 25px;
    border: none;
    text-transform: capitalize;
    transition: all 0.5s ease 0s;
}
@media only screen and (max-width: 639px){
    .form-horizontal .form-group{
        padding: 0 25px;
    }
    .form-horizontal .form-group i{
        left: 45px;
    }
    .form-horizontal .btn{
        padding: 10px 20px;
    }
}

.form-group.error span{
    color : red;
}